Automatic force sight-feed pump for lubricators.



No. 758,460. PATENTEDAAPE. 2E, 1904. G.- o. MUGUNE. AUTOMATIC EoEoESIGHT EEED PUMP EOE LUBEIGAToRs.

APPLIOETION FILED APE. 27, 190s. N'O MODEL.

1m: Norms Pzins co., wom-umn.. wAsHmawn, D. C.

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Gram Tn- CCM TN: Nunms PETERS no, vHoTo-uruo.. WASHINGTON, D. c.

UNITED STATES Patented April 26, 1904.

PATENT Fries.

GRANT CfMoCUNEyOF CHICAGO, ILLINOIS.

AUTONIATIC FORCE SIGHT-,FEED PUIVIF FIOR L UBRICATORS.

SPECIFICATION forming part of .Letters Patent No. 758,460, dated April26, 1904.

Application fue@ Aprii 27, 1903.

T0 all whom/ t may concern:

Be it known thatI, GRANT C. MCCUNE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Automatic ForceSight-Feed Pumps for yLubricators; and I do declare the following to bea full, clear, and exact description of the invention, such as Willenable others skilled in the art to which it appertains to make and usethe same.

This invention relates to improvements in automatic force sight-feedpumps for lubrication.

The object of the invention is to provide a pump for this purpose Whichmay be adjusted to give any desired feed and to provide means wherebysuch adjustment may be made without stopping the pumps.

A further object is todo away With the customary throttling of the feedby needle-point valves and also to provide a pump which will feed thesame number of drops per stroke irrespective of any change whateveryinthe temperature of the oil. f

A further object is to provide such a pump which will be simple inconstruction, positive in action, and'particularly adapted for forcingoil into cavities or chamberswhich are under pressure. Withthese andother objects in view the invention consists of certain novel featuresof construction, combination, and arrangement of parts, as will be morefully described, and particularly pointed out in the appended claims.

Figure 1 is a vertical sectional view of a lubricating-oil cup embodyingthe invention and showingone side of the pumps adjusted to full workingposition and the opposite side adjusted to a non-working position, theplungers of both sides being shown at the end of a downstroke. Fig. 2 isa similar view showing the plungers at the end of an upstroke.

In the drawings, 1 denotes the oil-cup, consisting, preferably, of theusual glass vcylinder closed at its upper end by a metal cap 2 andhaving its lowerend seated in a base-plate 3.

4 denotes a centrally-disposed guide-tube seria1N0.154,5oo.` (No model.)

having'a screw-threaded engagement with the cap 2 and the base-plate 3.l n

5 denotes a verticallyreciprocating connesting-rod slidably mountedinthe tube 4L and connected at its lower end with-a yoke, which isengaged by a crank 7 on the end of a crank-shaft 8, journaled in alaterally-projecting tubular arm 9, formed integral with avertically-disposed tubular standard 10, which has a` screw-threadedengagement at its upper end with the base-plate 3 of the cup, the saidtubular standard being adapted to inclose the lower end of the rod 5,the yoke 6, and crank 7. On the opposite end of the shaft 8 is mounted aratchet-wheel12, the teeth of which are adapted to be engaged by a pawlor dog 13, carried by a depending swinging armfl, provided at its upperend with a laterally-projecting tubular arm or sleeve 15, which isadapted to be inserted in the tubularfarm 9 and through which thecrank-shaft 8 is adapted to pass. y f

The lower end of the depending swinging arm 14 isconnected to one end ofa rod 16, the opposite end of which is connected Ato y a movable part ofthe engine or machine to which the device is attached. y 18 denotes anupwardly-projecting arm rigidly mounted on the tubular arm 9 and carry-Y ing at its upper end a pivoted pawl 19,which engages the teeth of theratchet-wheel 12 at the upper side thereof. y Thelobject ofthe pawl 19is to prevent retrograde movement of the ratchet-wheel 12, Al handle orknob 20 is fixed to the ratchetwheel, whereby the same may be operatedby hand, if desired. j The lower end of the tubular supportingstandard10 is suitably connected" to a stationary part of the engine andsupports the cup and the mechanism attached thereto.

Io the upper end ofthe connecting-rod 5 is' attached a lcross-head 21,to the ends of which are connected vertically-disposed i operating rods22, the lower ends of Which extend dovvn through openings in the cap 2and into the oil-cup l'and are connected to a cross-head 23, on which isformed a vertically disposed guide-sleeve 24C, which is adapted toengage and slide upon the tube 4. The lower ends of the operating-rods22 extend below the crosshead 23 and are screw-threaded for a purposehereinafter to appear. Milled heads 22a are provided for the rods 22 toenable them to be readily turned. The upper one of each pair of saidmilled heads is a jam-nut to retain the adjustment.

In the base-plate 3 are formed one or more cylindrical cavities 25, twoof which are shown in the drawings; but any number may be employed. Inthe base of each of the cylindrical cavities is mounted avertically-disposed tubular standard or guide-rod 26, on the upper endsof which are arranged conical valves 27, preferably in the form ofscrews, the lower ends of which have a threaded engagement with theupper ends of the tubular standards 26, and the conical heads of thescrews being adapted to form the valves. The stems of said valves haveoilpassage channels 27 Channels are also in the ends of the guide-rods26 opposite the channels 27 a. Below the lower threaded ends of thescrews the standards 26 are provided with an annular series of ports orpassages 28.

29 'denotes vertically-reciprocating sleeves, which are adapted to havea sliding engagement with the standards 26 and to be connected to andoperated by the cross-head 23. On the upper ends of the sleeves 29 areformed pump-cylinders 30, which reciprocate with said sleeves.

31 denotes cup-shaped pistons open at their upper ends and provided intheir lower ends with valve-seats 32. The pistons 31 are adapted to bemounted in the pump-cylinders 30, and upon these pistons the saidcylinders are adapted to reciprocate. The valve-seats 32 in the lowerends of the pistons are adapted to have a sliding engagement with thescrew-head valves 27, and when said valves are open the pistons areadapted to be supported upon the upper ends of the tubular standards 26,and when .the valves are closed the pistons are raised until thevalve-seats therein are brought into engagement with the valves, therebyclosing the valve-opening.

Near the upper end of the pistons is formed an exterior annular groovein which is seated an expansive ring 33, which is adapted to engage aninterior shallow annular groove 34, formed in the upper portion of thepump-cylinders. The upper` and lower walls of the groove 34 are slightlybeveled.

The engagement of the ring 33 on the pistons with the groove 34 in thecylinders causes the pistons to be moved up or down by the cylindersbetween the screw-head valves and the tops of the standards 26, and wheneither of the stops are reached the piston will be held, but thecylinder moves on, the beveled walls of the grooves 34 permitting thecylinders to disengage themselves from the ring 33, as will beunderstood.

At points above the pump-cylinders the cap 2 of the cup 1 is providedwith openings 35, above which are arranged cylindrical glass domes 36,closed at their upper ends by caps 37 and suitably fixed at their lowerends to the cap 2.

38 denotes tubular plungers adjustably mounted upon the sleeves 29. rEheupper ends of the plunger 38 are provided with laterallyprojecting arms39, which are adapted to have a screw-threaded engagement at their outerends with the lower threaded ends of the operating-rods 22. Thisconnection of the tubular plungers with the operating-rods and sleeves29 causes the parts to move simultaneously and as onepiece.

As the sleeves 29 and pump-cylinders are reciprocated by the rods 22 thelower ends of the sleeves are adapted to enter the cylindrical cavities25 in the baseplate, and when the tubular plungers are screwed down uponthe ends of the rods 22 to a working position` as shown at Ain thefigures of the drawings, the ends of the said plungers will on thedownstrolies thereof enter the cylindrical cavities 25, forcing the oilcontained therein out through valved discharge-ports 40, arrranged inthe base of said cylindrical cavities, and into the feed-tubes 41, whichare connected at their lower ends to the discharge-ports 40.

The tubes 41 project upwardly and are formed at the top with an archedor curved delivery end, which passes through the caps 37 and opens intothe domes 36 above and in line with the open ends of the pump-pistons3l. The oil from the cylindrical cavities 25 which has been forced outVthrough the valved ports 40 is forced upwardly through the tubes 41 anddrops into the open pistons 31 at each downstroke of the plungers 38.The number of drops forced out of the end of the tubes 4l is determinedby the position of the plungers 38 upon the sleeves 29, which positionis regulated by means of the screw-threaded engagement of theplunger-arms with the lower ends of the operating-rods 22, ashereinbefore described. The lower the plungers are adjusted the more oilwill be displaced and forced out of the cylindrical cavities 25 into thelower ends of the tubes 41 and a correspondingly larger discharge willoccur from the upper ends of the tubes, and vice versa.

The downstroke of the sleeves and plungers which forces the oil from thecylindrical cavities 25, as just described, also causes a downstroke andsuction of the pump-cylinders, simultaneously lowering the pistons bymeans of the expansive ring and groove connection therewith and opensthe valves in the lower ends of the same, allowing the oil which hasbeen dropped into the piston to be sucked out of the same and into thepump cylinder, whereupon on the upstroke of the pump-cylinders this oilis forced through the annular series of ports or passages 28 and intothe IOO ITO

tubular standard'26 through the same and past the check-valves 4t2 'and43, arranged in the lower end of tubular standard and in thedischarge-passage from the same, and from thence the oil is delivered tothe place of use.V

4operated at will and also that any degree of feed may be had, thisadjustment being accomplished by rotating the operating-rods 22and-screwing. the plungers up or down upon the lower threaded ends ofthe rods without stopping the workingof the pump.

In the arrangement of the parts it willbe lseen that there are no jointsto be packedex cept where the cap and `base-plate are fitted to theglass cylinder of the cup, and that the working parts being all insideof the cup and in the oil are self-lubricating. lFurthermore, saidparts, as well as the feed, are in plain sight and the working of samemay be observed at all times.

While a pawl-and-ratchet mechanism is herein shown and described as themeans for actuating the parts, it is obvious that other means may beemployed to accomplish the same purpose.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, andthe minor details ofVconstruction may be resorted to without departing from the prin- Qipleor sacricing any of the advantages of this invention.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

l. An oil-chamberV having an oil-receiving cavity, a plunger to operatein said cavity to force oil therefrom, means to operate the plunger, andan element, carried by and adjustable on the plunger and coactingtherewith and with the cavity to vary and predetermine the quantity ofoil forced from the cavity by the effective portion of the stroke of theplunger, substantially as described.

2. An oil-chamber having an oil-'receivingV cavity forming a cylinder, apassage leading from said cavity, a tubular guide extending through saidcavity and having a closed end and an intersecting passage 28, a tubularplunger operating on said tubular guide and in said cavity to force oilfrom the cavity through said first-mentioned passage, a hollow piston inthe enlarged upper portion of said tubular plunger carried by saidtubular guide and adapted to receive oil from saidfirst-mentionedpassage, and having a valved passage communicating withthe interior of said enlarged portion, whereby the oil forced by theplunger from the receivingcavity is also forced by said hollow pistonthrough the tubular guide, substantially as described.

3. In a device of the character described, the combinationwith anoil-chamber, having one or more cavitiesor openings formed in the bottomof the same, and adapted to contain oil, one or more reciprocatingplungers adapted to work in said cavities to force the oil from thesame, pumping mechanism arranged on the upper ends of said plungers andadapted to be operated thereby, means for conducting the oil forced fromsaid cavities to said .pumping mechanism, and means for conducting theoil from said pumping mechanism to the place of use, substantially asdescribed.

4. In adevice of the character described, the combination with anoil-chamber having one or more cavities formed in the bottom of the sameand adapted to contain oil, of tubular guide-standards projectingupwardly from said cavities, plungers adapted to reciprocate upon saidstandards to force the oil from said cavities, pump-cylinders carried bythe upper ends of said plungers and adapted to reciprocate therewith,hollow pistons arranged upon the upper ends of said tubular standardsand adapted to operate in conjunction with vsaid cylinders, valvedpassages through said pistons, valved passages adapted to conduct theoil forced out of said cavities to said hollow pump-pistons, portsformed in the upper ends of said tubular standards, through which saidoil is forced by said pistons into said standards, and valved passagesformed at the lower ends of and communicating with said tubularstandards, whereby the oil is conducted to place of use, substantiallyas described.

5. Inadevice of the character described, the combination with anoil-chamber having one or more cavities formed in the bottom of thesame, one or more reciprocating plungers IOO IIO

adapted to work in said cavities to force the oil from the same, meansfor independently moving any one of said plungers out of workingposition, pumping mechanism carried and operated by said pl ungers,valved passages adapted to conduct the oil forced from said cavities tosaid pump mechanism, and means for reciprocating said plungers.

6. In adevice of the character described, the combination with anoil-chamber having one or more cavities formed in the bottom of thesame, one or more reciprocating plungers adapted to work in saidcavities to force the oil from the same, means for adjusting saidplungers to force more or less oil out of said cavities, pumpingmechanism carried and operated by said plungers, valved passages adaptedto conduct the oil forcedV same, one or more reciprocating two-partplungers, adapted to Work in said cavities to force the oil from thesame, pumping mechanisms carried and operated by said plungers,

valved passages adapted to conduct the oil forced from said cavities tosaid pumping mechanisms, valved passages for conducting the oil fromsaid pumping mechanisms to service pipes, vertically reciprocatingcrossheads adapted to carry the respective parts of said plungers, avertically-reciprocating connecting-rod carrying at its upper endacrosshead, and operating-rods connected to and carried by saidcross-heads and connected to the plungers and arranged to adjust theparts of the latter to `force more or less oil from said cavities or tomove said plungers entirely out of operation, and means for actuatingsaid connecting-rod, substantially as described.

8. Inadevice of the character described, the

combination With an oil-chamber having one or more cavities formed inthe bottom of the same and adapted to contain oil, of one or morereciprocating plungers adapted to Work in said cavities to force oilfrom the same, pumping mechanisms carried and operated by said plungersfor forcing the oil delivered Jfrom said cavities to serVice-pipes,averticallyreciprocating cross-head adapted to carry said plungers, avertically-reciprocating connecting-rod carrying at its upper end across-head, operating-rods adapted to connect said crossheads, asuitably-mounted crank-shaft connected to and adapted to operate saidrod, a ratchet-Wheel carried by the opposite end of said crank-shaft, asuitably-mounted swinging arm carrying a pawl which is adapted to engageand turn said ratchet-Wheel and crankshaft, means for oscillating saidarm, and means for preventing a retrograde movement of saidratchet-Wheel, substantially as described.

In testimony whereofI have hereunto set my hand in presence of two subscribing Witnesses.

GRANT C. MCCUNE. Witnesses:

J. A. RADFoRD, F. A. IRoNs.

